Reinforced spool assembly

Abstract

A reinforced spool assembly has a shaft, a spool member coaxially mounted around the shaft, and two ratchets mounted on two axial ends of a combination of the shaft and the spool member. Each one of two ratchets has a body having an inner surface. The two inner surfaces of the two bodies face each other. In each one of the ratchets, the body has a reinforced supporting structure. The reinforced supporting structure is located between the shaft and the spool member and is offset from the inner surface of the body. A reference plane is defined on and extends along the inner surface of the body, is perpendicular to a central axis of the shaft, and passes through the reinforced supporting structure. Mechanical strength of the reinforced spool assembly is increased by the reinforced supporting structure.

What is claimed is: 
     
         1 . A reinforced spool assembly comprising:
 a shaft;   a spool member coaxially mounted around the shaft, wherein a spacing is formed between an inner wall of the spool member and an outer wall of the shaft;   two ratchets, each one of the two ratchets having
 a body having an inner surface; and 
 multiple teeth formed around a periphery of the body; 
   wherein two axial ends of a combination of the shaft and the spool member are inserted into and fixed on the two bodies of the two ratchets, and the two inner surfaces of the two bodies face each other; and   wherein the body has a reinforced supporting structure, the reinforced supporting structure is located between the outer wall of the shaft and the inner wall of the spool member, the reinforced supporting structure is offset from the inner surface of the body, an imaginary extension plane of the inner surface of the body is perpendicular to a central axis of the shaft and passes through the reinforced supporting structure.   
     
     
         2 . The reinforced spool assembly as claimed in  claim 1 , wherein in each one of the two bodies of the two ratchets, the reinforced supporting structure has a supporting ring mounted around the shaft, a side surface of the supporting ring facing a middle of the spool is offset from the inner surface of the body. 
     
     
         3 . The reinforced spool assembly as claimed in  claim 2 , wherein the spool member has multiple spool tabs respectively formed on two axial ends of the spool member and located around the shaft at spaced intervals;
 in each one of the two ratchets, the body has a center hole located at a center of the body, a supporting area located around the center hole, and multiple fixing holes disposed around the supporting area, an edge of each one of the fixing holes is adjacent to an outer periphery of the supporting area;   the two axial ends of the shaft are respectively and fixedly inserted into the two center holes of the two ratchets, the spool tabs formed on the two axial ends of the spool member are respectively and fixedly inserted into the fixing holes of the two ratchets; the supporting ring of the reinforced supporting structure is located at the supporting area and abuts the shaft and the spool tabs of the spool member.   
     
     
         4 . The reinforced spool assembly as claimed in  claim 1 , wherein in each one of the two bodies of the two ratchets, the reinforced supporting structure has multiple supporting blocks surrounding the shaft, each one of the supporting blocks has a block surface; the block surface is a side surface of the supporting block, faces a middle of the shaft, and is offset from the inner surface of the body, and each one of the supporting blocks abuts against the shaft and the spool member. 
     
     
         5 . The reinforced spool assembly as claimed in  claim 4 , wherein the spool member has multiple spool tabs respectively formed on two axial ends of the spool member and located around the shaft at spaced intervals;
 the body has a center hole located at a center of the body, a supporting area located around the center hole, and multiple fixing holes disposed around the supporting area, an edge of each one of the fixing holes is adjacent to an outer periphery of the supporting area;   the two axial ends of the shaft are respectively and fixedly inserted into the two center holes of the two ratchets, the spool tabs formed on the two axial ends of the spool member are respectively and fixedly inserted into the fixing holes of the two ratchets; each one of the supporting blocks of the reinforced supporting structure is located at the supporting area; the supporting blocks and the spool tabs are equal in amount, and the supporting blocks respectively correspond to the spool tabs in position; each one of the supporting blocks abuts between the corresponding spool tab and the shaft.   
     
     
         6 . The reinforced spool assembly as claimed in  claim 1 , wherein the spool member has a non-slip surface formed on an outer surface of the spool member.